Part-75: To Implement a Regional External Network Load balancer with TCP Pass through in GCP Cloud
Cloud Load Balancing - Network Load Balancer (TCP Pass-through)
A Layer 4 load balancer (works at TCP/UDP level, not HTTP).
It’s called pass-through because traffic is not terminated at the load balancer → instead, it goes straight through to backend VMs.
The backend VM handles the connection directly.
Pass-through (Layer 4)
NLB doesn’t process or inspect application data (like HTTP headers).
It just forwards packets (TCP/UDP) to backend VMs.
Backends terminate the connection (not the LB).
Scope
Regional only (no global NLB).
Can only use backends in the same region.
Accessibility
External NLB → Accessible from the internet.
Internal NLB → Only accessible from within the VPC (or via VPN/Interconnect).
Step-01: Introduction
Create Regional Application Load Balancer - TCP Pass-through
Acc…
( 8
min )